[tz] [PATCH] New file 'pre1970' for zones that differ only in pre-1970 time stamps.

[random832 at fastmail.us]

On Sat, Aug 31, 2013, at 22:46, Zefram wrote:
> I wrote:
> >                  Next up is use of tzwinnow in tzselect, which is the
> >point at which we start to get a tangible benefit, so that's probably
> >when I should start actually posting the patches.
> 
> Now implemented this.  Interesting discovery: this is actually the
> most complex place to apply winnowing.  It's not just a matter of
> making links: the region descriptions in zone.tab have to be merged,
> and doing that in a way that produces legible results takes some effort.
> I'm happy with the results I'm getting.

It may be beneficial to add some manual hinting. The largish merged
UTC+01 zones in Europe should probably be described as some variation on
"Central European Time", a string that appears nowhere in zone.tab.